1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 1ce84ed0b765..a1a3e6df17b8 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -880,6 +880,7 @@ static int dev_set_geometry(struct dm_ioctl *param, size_t param_size)
         struct hd_geometry geometry;
         unsigned long indata[4];
         char *geostr = (char *) param + param->data_start;
+        char dummy;
 
         md = find_device(param);
         if (!md)
@@ -891,8 +892,8 @@ static int dev_set_geometry(struct dm_ioctl *param, size_t param_size)
                 goto out;
         }
 
-        x = sscanf(geostr, "%lu %lu %lu %lu", indata,
-                   indata + 1, indata + 2, indata + 3);
+        x = sscanf(geostr, "%lu %lu %lu %lu%c", indata,
+                   indata + 1, indata + 2, indata + 3, &dummy);
 
         if (x != 4) {
                 DMWARN("Unable to interpret geometry settings.");